Incorrect wrapping when URLs contain dashes

[thanethomson]

Sometimes, as per informalsystems/tendermint-rs#1016, unclog wraps URLs incorrectly when users add entries via the CLI.

In that case, the entry was originally incorrectly wrapped as:

- `[tendermint]` The `tendermint::node::Id` `Display` implementation now prints the hexadecimal string in lowercase ([#971](https://github.com/informalsystems/tendermint-
  rs/issues/971))

(See informalsystems/tendermint-rs@7506663)

This is most likely due to something in the way that textwrap wraps things.